Improvement in belt-fasteners



s. BUDLO'NG sp'wjo. TALGOTT. Belt-Fasteners.

No. 216,827. Patemeduune 24,1579.

@ma @mi m3 NITED STATES PATENT OFFICE.

SIMEON BUDLONG AND WALTER O. TALCOTT, OF PROVIDENCE, R. I.

IMPROVEMENTlN BELT-FASTENERS.

` Specification forming part .of Letters Patent No. 216,827, dated June 1879; application iilcd May 28, 1879.

To all whom it may concern: Be it known that we, SIMnoN BUDLoNe and WALTER O. TALCOTT, of the 'city and county of Providence, and State ofRhode Island, have invented certain new and useful Improvements in Belt-Fasteners and we do hereby declare that the following specification, taken in connection with the drawings furnished and forming a part thereof, is a clear, true, and complete description thereof.

lOurimprovements relate to that class of beltfasteners which embody non-clinchable teeth on plates; and the objects sought by us are to render them more effective and durable, and less liable to displacement either from a running or a free belt, than any others heretofore known to us.

One feature of our invention consists in a belt-fastener consisting of a plate provided with flat teeth, which have knife ends, are set edgewise to the line of the belt, and have one or more shoulders or barbs on their front edges.

In certainprior United States Letters Patent issued to us May 20, 1879, No. 215,567, we have shown and described chisel-shaped iiat teeth set edgewise to the line of the belt, and in our Letters Patent dated July 2, 1878, N o. 205,610, we have shown sharp-pointed teeth having` barbs or shoulders located upon the sides and fronts of the teeth.

Our present improvement consists, therefore, in the employment of front barbs or shoulders on a knife-end tooth or a chisel-shaped tooth, to secure a more reliable engagement of the belt with the fastener while in use, and even when free, than is possible with the pointed barbed teeth.

The cutting end of the tooth provides for its perfect entrance into the belt, and the tensile strain on the belt when in use forces the belt into the recess adjacent to the front shoulder or barb, rendering it practically impossible for the fastener to iiy from the belt, as is liable with the pointed barbed teeth on high-speed belts; and when the belt is free the weight of the fastener is amply sufficient to prevent it from freeing itself and dropping from the belt, because the knife ends in being driven have so cut the belt that the barbs are snugly embedded therein.`

The sharp flat ends may be beveled on one or both sides to provide for the knife-edge.

Our invention further consists in a belt-fastener having iiat knife-end teeth, provided with one or more shoulders or barbs on their front edges and an inclined rear edge. This feature is one of great practical importance, because therewith the entering edge of a tooth may be made no wider than the width of the shank above the shoulder, and also because in forcing the belt thereon it is bythe inclinedv rear edge caused to be forcibly engaged with the front barb or shoulder by the mere act of driving, the subsequent strain on the belt rendering the engagement still more effective.

In order thatourbelt-fasteners may be adapted for efficient use with leather belts of two or more thicknesses and with so-called rubber belts, our invention further consists in a beltfastener tooth provided with shoulders or barbs at two or more different points in its length, so that while one barb or shoulder may engage with one thickness of material, the other barbs may, in like manner, engage with other thicknesses, and so serve to maintain the ends of the belt ina solid condition. This feature of our invention is also important in view of the fact that after a belt-fastener having teeth, as described, with two or more front barbs has become so worn and shortened that the teeth would. have but a single barb or shoulder it `may thereafter be of service on thinner belts quite as efficiently as if it were a new fastener with teeth and barbs proportioned for service with a thin belt.

Belt-fasteners embodying our present improvements may be constructed, as shown in A one of our prior Letters Patent, with the teeth on both sides of the plate, for insertion between the layers of a double belt, and properly engaging with both of said layers.

To more particularly describe O ur invention we will refer to the accompanying drawings, in which- Figures 1 and 1l represent, in side View and bottom View, respectively, a belt-fastener with teeth embodying our improvements. Fig. 2 represents, in edge view, one of the teeth, and shows its cutting or entering edge. Fig. 3 represents, in side view, a tooth embodying in one form all of the f'eatures of our invention. Fig. 4 represents, in side view, a tooth embodying two features of our invention. Fig. 5 represents, in side view, a tooth embodying the frontshoulders or barbs located at different points longitudinally, and also the rear incline.. Fig. 6 represents, in side view, a tooth embodying; two front shoulders or barbs. Figs. 7 and 8 represent, in side view, respectively, a tooth having a front shoulder in aV modified form, and the same tooth, after insertion into a belt, with its shoulder more fully developed by a slight front bend. 9 represents a double-faced belt-fastener with our improved teeth on each side of the plate. Fig. l() represents one of our belt-fasteners with the ends of a belt partially attached for illustrating the most desirable method of `iointing the ends of the belt.

The plate A, as heretofore, is proportioned in its width, length, and thickness according to the particular service intended, and is concave-convex in its length, for more lreadily passing over a pulley.

We have made the fasteners complete by casting in malleable iron, brass, and bronze, the teeth being subsequently finished by tools adapted for the purpose.

The teeth B are flat, set edgewise to the line of the belt, and sufficiently sharp at the end to admit of their being entered into a belt without unduly tearing or breaking the leather i or other material of which the belt is commay be variously formed, several modifica-v tions thereof being shown in the drawings.

In Fig. 1,3, 4, and 9 the front shoulder, a, is rectangular to the front edge of the tooth, affording a bearing for the portion of the belt with which it engages, which is practically parallel with the coincident surface of the plate A, thus forming a recess above the barb occupied by the belt, from which displace ment is rendered quite difficult, except by eX- pert manipulation.

In Fig. 10 we show the manner in which we prefer to joint the beltG. Its ends are reversely beveled, as shown, and when the ends are raised from the plate the belt is driven partially upon the teeth which are nea-r the ends of the plate, and the beveled ends of the belt are then driven inward, which forces the belt in both directions into the recesses above the shoulders before referred to.

As a rule, the ends of the teeth do not protrude from, or even extend to, the inner side of the belt, and therefore the pulley-contact is as perfect beneath the belt-fastener as at any other portion of the belt.

In applying the double fastener, Fig. 9, to a double belt the same method of jointing is preferred; and it is also desirable that the Fig.

ends of the plate A project beyond the end rows of teeth, and that it be gradually revduced iii-thickness, as shown.

The front shoulders or barbs, as shown in thickness thereof. has a shoulder or barb to itself. This location of the shoulders or barbs: at two or more different points in the length: of the tooth is an important feature, whether all of the barbs be on the front edge or partially'on the front and partially on the rear edge, as shown in Figs. l and 3.

In Fig. 3 several barbs `or shoulders are shown on the rear edge and one on the front edge; and in the teeth of Fig. l there is a single rea-r barb or shoulder, a2, at a point nearer the plate than the front barb or shoulder.

Another important novel feature in our beltfastener teeth is the rear inclined edge, b.

It will be seen in Figs. l, 3, and 4 that the end of the teeth so provided have an entering or driving knife-edge, which is of about the same width as the tooth, above the front barb, so that as the belt is driven upon a tooth the inclined edge moves the tooth forward or the belt backward, whichever may be the case; and when the tooth is well seated the aperture in the belt abovethe front barb will be only of such size as will snugly contain the shank of the tooth, and the leather will s'o fully occupy the recess above the barb that the fastener can only be detached by careful and skillful manipulation.

The teeth shown in Figs. 7 and S embody a front barb or shoulder, a3, with a slight rear incline, and a further development of the barb shown into a rectangular barb is effected by a blow from a hammer or lnallet after the teeth have been fully inserted into the belt, causing the tooth to assume the form indicated in Fig. S.

It is to be distinctly understood that we do not limit ourselves to front and rear barbs of any particular form in combination with the knife-end, as said barbs can be varied to a considerable degree without impairing their usefulness.

So far as relates to locating two or more barbs at different points in the length of the tooth, it is not to be understood that we con fine this portion of our invention relating to their location to the front and rear edges of a fiat knife-edge tooth, because side barbs of the character shown in our former Letters Patent, in connection with pointed teeth, if located at two or more different points between the plate and the tip of the tooth, will perform a valuable service approximating more or less closely to the service ofthe front and rear barbs.

We prefer in fasteners adapted for other than Very light service to employ at least two rows of teeth at each end of the fastener; and as one row of the barbed teeth at each end is sufficient for effecting the desired union of the fastener with the beltfor preventinglaecidental displacement from a free belt or detachment from a driven belt, the other row or` rows may be of plain teeth without barbs, as in Fig. 1, which will afford the same bearing for the belt, having reference solely to the teusile strain thereon, as the barbed teeth.

Having thus described our invention, we claim as new and desire to secure by Letters Patent- 1. A belt-fastener consisting oi' a plate provided with iiat front shouldered or barbed `teeth with knife-ends set edgewise to the line of the belt, substantially as described.

2. A belt-fastener plate provided with teeth lla-ving one or more front shoulders or barbs, a knife-end, and area-r edge inclined, substantiallyas described.

3. A belt-fastener plate provided with teeth having two or more barbs or shoulders located at different points in the length of tlleteeth, substantially as described.

SIMEON BUDLONG. WALTER 0. TALDOTT. Witnesses:

GILMAN E. J OPP, THos. A. MILLETT. 

